Boiler.



H. 0. KBFERSTBIN.

Patented Jan. 5, 1909.

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H. 0. KEFBRSTEIN.

BOILER.

APPLICATION FILED 00125, 1908.

Patented Jan. 5, 1909.

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H. 0. KEFERSTEIN.

BOILER.

APPLICATION rum) OUT. 5, 1908.

Patented Jan. 5, 1909.

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HANS O.'KEFERSTEIN, OF NEW ORLEANS, LOUISIANA.

BOILER.

Specification of Letters Patent.

Patented Jan. 5, 1909.

Application filed October 5, 1908. Serial No. 456,211.

To all whom it may concern:

Be it known that I, HANS O. Knrnas'rnm, a subject of the Emperor ofGermany, residing at New Orleans, in the parish of Orleans and State ofLouisiana, have invented certain new and useful Improvements in Boilers;and I do hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

This invention relates to steam boilers provided with tubes for fire andfor water; and it consists in the novel construction and combination ofthe parts hereinafter fully described and claimed.

In the drawings, Figure 1 is a vertical section of a steam boiler. Fig.2 is a cross-section taken on the line xac in Fig. 1. Figs. 3 and 4 arealso vertical sections showing modifications of the boiler shown in Fig.1.

A and B are two chambers which are separated from each other by asuitable partition or partitions.

O is a fire-grate at the lower part of the fire-chamber A, and D is achimney at the upper part of the smoke-chamber B.

E is the bridge-wall which forms the lower part of the partition betweenthe chambers A and B, the up er part of the partition being formed by te headers of the boiler as hereinafter fully described. The boiler isdivided into two sections F and G, each section having its ownfire-tubes H and water-tubes I. The heating section F of the boiler isarranged in the smokechamber B, and it is provided with a header J. Theother section G of the boiler is arranged in the fire-chamber A, and itis provided with a header K. The two headers J and K are arranged overthe bridge-wall E at a little distance apart, so that an intermediatechamber L is formed between them, and these two headers and the chamberL form the upper part of the partition which separates the chambers Aand B.

M is a plate which supports the rear end portions of the water-tubes inthe smokechamber; and N is a plate which supports the front ends of thewater-tubes in the firechamber.

O is a partition plate which separates the header J into twocompartments P and Q.

R is a partition plate which separates the header K into twocompartments S and T. A receiver U is arranged above the header K,

and the partition R extends into it nearly to its top, so that thereceiver is connected with the compartments S and T.

Y is an inlet pipe for cold water connected to the bottom part of thecompartment P.

W is a pi e which connects the two compartments and T at their bottomends.

V is a steam pipe which connects the top of the compartment Q, with thesteam space of the receiver U. A steam outlet or delivery pipe 2 isconnected to the receiver U.

The water-tubes of the section F are connected at one end with thecompartment P, and their other ends are supported by the plate M, andare closed by caps 3. The firetubes of the section F are arranged insidethe Water-tubes, and pass through holes in the caps 3 and in the headerJ, so that the intermediate chamber L is connected with thesmoke-chamber B. The upper side of each water-tube oi the section F isconnected with the compartment Q by means of a tubular connection 4. Alongitudinal partition 5 is provided at the header end portion of thesection F between its fire-tubes and watertubes.

The water-tubes of the section G are connected at one end with thecompartment T, and their other ends are supported by the late N, and areclosed by caps 6. The firetubes of the section G are arranged inside thewater-tubes, and pass through holes in the caps 6 and in the header K,so that the intermediate chamber L is connected with the fire-chamber A.The upper side of each watertube of the section G is connected with thecompartment S by a tubular connection 7, and a longitudinal partition 8is provided at the header end portion of the section G between eachfire-tube and the water-tube which incloses it.

The products of combustion from the grate pass in the direction of thearrows 10 between the water-tubes of section G, through the fire-chamberA and over the plate N; thence through thefiIe-tubes of both sectionsand the intermediate chamber, through the smoke-chamber and under theplate M to the chimney. The cold water enters the compartment P by thepipe Y, and passes through the water-tubes of section F in the directionof the arrows 11; thence downward through compartment Q, through thepipe W, and upward through the compartment T, and through the watertubesof section Gr. The steam generated in section G through the compartmentS, in the direction of the arrows 12, into the receiver. steam generatedin the section F passes from the compartment Q to the receiver by the.

"they may be arranged in line with each other if desired.

'Inthe modification shown in Fig. 3, the two chambers a and b haverespectivelya grate c and a chimney d, and are separated by a partitionthe-lower part of which is formed by thebridge-wall e. The two sectionsf and glof the'boiler are arranged-in the chambers b and a respectively,and have fire-tubes h and water-tubes 'i. A single header 20 is arrangedover the bridge-wall,

and-is provided with two partitions 21 and 22, which separate it intothree compartments 23, 24, and 25. A receiver a is arranged over theheader 20 and is connected to its compartments 24 and 25. The rear endsof the-water-tubes of the section f are connected to and supported by awater-chamber or header 30, and 31 is a pipe which connects the upperpart of the header 30 with the water space ofthe receiveru. A plate nsupports the front ends of the watertubes of section 9, and thewater-tubes and fire-tubes of this section 9 are provided withlongitudinal partitions 8 in said water-tubes. The water-tubes i ofsection f are connected to the chamber 30 and to the compartment 23. Thewater-tubes of section 9 are connected to the compartment 25, and theyare provided with tubular connections 32 between their lower parts andthe compartment 24. The fire-tubes h of both sections are continuous,and pass through the chamber 30 and the compartments 23, 24 and 25,their front ends being secured in the caps 6 of the water-tubes of thesection g. The productsof combustion pass from the grate in thedirection of the arrows 10, through chamber a,"the fire-tubes, andchamber I), to the chimney. The cold water enters the lower part ofcompartment 23 by the pipe y, and passes through the water-tubes ofsection f, upward through chamber 30 and pipe 31, and the receiver, downthe compartment 24 into the wateretubes of section g, in the directionof the arrows 11. The steam passes from the water-tubes of section 9through the compartment 25 to the receiver in the direction of thearrows 13. Any

passes from its Water-tubes,

The

steam formed in section f .passes through the pipe 31 into the receiverwith the water.

In the modification shown in Fig. 4, the chambers a and b haverespectively a grate ,cc, and a chimney d, and are separated by apartition the lower part of which is formed by the brid e-wall e. Thetwo sections f and g of tie boiler are arranged in the chambers b and arespectively, and have fire-tubes h and water-tubes i. A single header40 is arranged over the bridge-wall, and is provided with two partitions41' and .42, which separate it into three compartments 43, 44, and 45. Areceiver uis arranged over the header :40 and is connected to thecompartments 44 and 45. Therear ends of the water-tubes of section f areconnected to a water-chamber or. header 50,the upper part of whichcommunicates with the receiver by a pipe 51. A water-chamber or header52 communicates with and supports thefront ends of the water-tubes ofsection 9 and this header 52 is connected with the water space ofthereceiver byapipe 53. The water-tubes of section f areconnected with thecompartment v43; and the water tubes of section g are connected withthecompartment 45. The fire-tubes of both sections are continuous, andextend through the water-tubes andheaders. Theproducts of combustionpass from the grate in the direction of the arrows 10, through thechamber a, the fire-tubes, and chamberib,

to the chimney. Thecold water enters the lower part of compartment .43:by the pipe y, and passes through the water-tubes of section f, the.header 50, receiver u, pipe 53, header 52, into the water-tubesofJsection g, inthe direction of :thearrows .11. Thesteam passes fromthe water --tubes of section 9, throughthe compartment 45 -to thereceiver a, .in the direction of the arrows 13.

:VVhat I claimis: 1

.1. In a boiler, the combination, with a fire-chamber, andasmoke-chamber; offiretubes operatively conncctingithe saidcham- :bers,water-tubes encircling the said firetubes, and arranged vin the saidchambers in separate series, and means 'for circulating .the waterthrough the series of water-tubes in the said smoke-.chamberand thence:into the series of water-tubes in the said :firechamber.

2. In a boiler, the combination, with a fire-chamber, andasmoke-chamber; of firetubes operatively connecting thesaid chamb'ers,water-tubes encircling the said firetubes and arranged in the saidchambers in separate series, a receiver for steam and .125 waterarranged above all thesaid tubes, a compartment .operatively connectingthe water-tubes in the fire-chamber with the steam space .of thesaidreceiver, .and means for circulating the water through the series ofwater-tubes in the said smoke-chamber and thence into the series ofwater-tubes in the said fire-chamber.

3. In a boiler, the combination, with a fire-chamber, and asmoke-chamber, said chambers being arranged side by side and separatedby a partition: of fire-tubes which conduct the products of combustionthrough the said partition and which connect the front end portion ofthe said fire-chamber with the rear end portion of the saidsmokechamber, water-tubes encircling the said fire-tubes and arranged inthe said chambers in separate series, and means for circulating thewater through the series of water-tubes in the said smoke-chamber andthence into the series of water-tubes in the said firechamber.

4. In a boiler, the combination, with a fire-chamber provided with agrate at its lower part, and a smoke-chamber arranged to the rear of thesaid fire-chamber and provided with a chimney at its upper part; offire-tubes operatively connecting the opposite end portions of the saidchambers, Water-tubes encircling the said fire-tubes and arranged in thesaid chambers in separate series, and means for circulating the waterthrough the series of water-tubes in the said smoke-chamber and thenceinto the series of water-tubes in the said fire-chamber.

5. In a boiler, the combination, with a fire-chamber, a smoke-chamber,and an intermediate chamber, said chambers being separated bypartitions; of fire-tubes connectmg the said intermediate chamber withthe front end portion of the said fire-chamber and with the rear endportion of the said smoke-chamber respectively, water-tubes encirclingthe said fire-tubes and arranged in separate series in the saidfire-chamber and smoke-chamber, and means for circulating the waterthrough the series of water-tubes in the said smoke-chamber and thenceinto the series of water-tubes in the said firechamber.

6. In a boiler, the combination, with a fire-chamber, a smoke-chamber,and an intermediate chamber, said chambers being separated bypartitions; of two headers which form portions of the said partitions,each of the said headers having two compartments, fire-tubes passingthrough the said headers and connecting the said intermediate chamberwith the opposite end portions of the said fire-chamber andsmokechamber, water-tubes encircling the said firetubes and arranged inseparate series in the said fire-chamber and smoke-chamber, saidwater-tubes being operatively connected with the compartments of theheaders pertaining to the said chambers, and means for circulating thewater through the series of water-tubes in the said smoke-chamber andboth compartments of the header connected to them and thence into one ofthe compartments of the other header and the watertubes connected to itand arranged in the said fire-chamber.

In testimony whereof I have affixed my signature in the presence of twoWitnesses.

HANS O. KEFERSTEIN.

Witnesses THOS. MCDERMOTT, O. COOHRANE.

